Equivalent step-index profile for graded W-fibres: application to TE01 mode cut-off |
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| Authors: | P. L. Francois M. J. Adams R. J. Mansfield R. D. Birch E. J. Tarbox |
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| Affiliation: | (1) Department of Electronics, University of Southampton, Southampton, UK |
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| Abstract: | Snyder's equivalent step-index method is extended to the case of graded profiles with a depressed cladding. This method is then used to determine the limit of monomode operation. Comparison with the results obtained by an exact numerical technique is made for a large variety of simulated profiles, including those with ripples in the cladding. Conclusions are drawn concerning the sensitivity of various profile-shapes to such ripple structure. The method is applied also to measured profiles, reconstructed by a well-known tomographic procedure. In this latter case a comparison is made with experimentally determined values.On leave from CNET, Lannion, France. |
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